When she wakes how upset is she? I found at one stage Ashleigh was waking exact same times every night and I knew she wasn't always hungry but if I went in to her she'd only settle with the breast.
So one night she was grizzly crying and I thought I'll not go in and see what happens. It went on and off for about 10-15 mins then she was asleep. Maybe see if you can stretch her out like that? In a couple nights she stopped waking at that time. If she is getting quite upset then go in and see maybe if you can settle her without getting her up?
I know though at night when you are sleep deprived you just don't want anything that will take awhile to settle them when you know the boob will do the trick in minutes.
You could keep going as you are and hope its a phase but if it goes on too long maybe see your MCHN and she could refer you somewhere for help.